Veritas Storage Foundation™ for Oracle 5.0.1 Administrator's Guide

See the Veritas Storage Foundation for Oracle
Installation Guide.
If you are not currently running on VxVM
and VxFS, make sure Veritas Storage
Foundation for Oracle is installed and
convert your existing database
configuration.
See “About Storage Checkpoints and Storage
Rollback” on page 149.
For backup and recovery on the same host,
you can use the Storage Checkpoint facility
to create file system snapshots of the
database. A Storage Checkpoint creates an
exact image of a database instantly and
provides a consistent image of the database
from the point in time the Storage
Checkpoint was created.
For off-host processing or backup, you can
use the Database FlashSnap feature to create
a volume snapshot for the database.
Database FlashSnap lets you capture an
online image of an actively changing
database at a given instant, known as a
snapshot. You can perform backups and
off-host processing tasks on snapshots while
providing continuous availability of your
critical data.
About setting up a disk group
Before creating file systems for a database, set up a disk group for each database.
A disk group lets you group disks, volumes, file systems, and files that are relevant
to a single database into a logical collection for easy administration. Because you
can move a disk group and its components as a unit from one machine to another,
you can move an entire database when all the configuration objects of the database
are in one disk group. This capability is useful in a failover situation.
Disk group configuration guidelines
Follow these guidelines when setting up disk groups:
■ Only disks that are online and do not already belong to a disk group can be
used to create a new disk group.
■ Create one disk group for each database.
■ The disk group name must be unique. Name each disk group using the Oracle
database instance name specified by the environment variable $ORACLE_SID
47Setting up databases
About setting up a disk group